greater petrosal nerve

(redirected from Greater petrosal)

great·er pe·tro·sal nerve

[TA]
a branch from the genu of the facial nerve exiting via the hiatus of the facial canal and running in a groove on the anterior surface of the petrous part of the temporal bone beside the foramen lacerum to join the deep petrosal nerve, thus forming the nerve of the pterygoid canal, which passes through the pterygoid canal to reach the pterygopalatine ganglion.

great·er pe·tro·sal nerve

(grā'tĕr pĕ-trō'săl nĕrv) [TA]
A branch from the genu of the facial nerve exiting by way of the hiatus of the facial canal and running in a groove on the anterior surface of the petrous part of the temporal bone beside the foramen lacerum to join the deep petrosal nerve, thus forming the nerve of the pterygoid canal, which passes through the pterygoid canal to reach the pterygopalatine ganglion.
Synonym(s): greater superficial petrosal nerve, nervus petrosus major, parasympathetic root of pterygopalatine ganglion.

great·er pe·tro·sal nerve

(grā'tĕr pĕ-trō'săl nĕrv) [TA]
A branch from the genu of the facial nerve exiting by way of the hiatus of the facial canal and running in a groove on the anterior surface of the petrous part of the temporal bone beside the foramen lacerum to join the deep petrosal nerve, thus forming the nerve of the pterygoid canal, which passes through the pterygoid canal to reach the pterygopalatine ganglion.
Synonym(s): greater superficial petrosal nerve, nervus petrosus major, parasympathetic root of pterygopalatine ganglion.
References in periodicals archive ?
The parasympathetic preganglionic fibers stems from facial nerve in medulla which traverses as a greater petrosal nerve.
The incus and the malleus' head were removed to provide access to the SGF, which is the triangular anatomical area between the FN (tympanic portion), the GG and the greater petrosal nerve caudally, the MCF dura cranially, and the labyrinthine bloc dorsally (Figure 2) [4-7].
Taste sensation from the taste buds is also supplied by the greater petrosal, vagus, and glossopharyngeal nerves, and it has been reported that cutting the chorda tympani nerve may abolish some inhibition of the glossopharyngeal nerve.
Sensory information from the skin of the external auditory canal, concha, and from the mucous membranes of the nasopharynx and palate is carried via the greater petrosal nerve that originates from the geniculate ganglion.
Kawamoto and Ikeda studied the greater petrosal nerve function in BP/Ramsay Hunt syndrome patients by means of Schirmer's tear test and soft palate electrogustometry (EGM) [22]; in their study EGM appears to be a more sensitive method for testing the function of the GPN; the results of lacrimal function test were more closely related to the severity of and prognosis for facial paralysis than the results of EGM.
Ikeda, "Evaluation of greater petrosal nerve function in patients with acute peripheral facial paralysis: comparison of soft palate electrogustometry and schirmer's tear test," Acta Oto-Laryngologica, vol.
The parasympathetic or secretomotor component (greater petrosal nerve from SG) comes from the upper salivatorius nucleus having fibers which are shared with the facial nucleus (intermedius nerve).
(5) Because the greater petrosal nerve is rarely discernible on CT and magnetic resonance imaging (MRI), these imaging modalities confer no benefit for the purpose of preoperative planning.
Quantitative studies of the greater petrosal nerve of the mouse with the electron microscope.
The geniculate ganglion is located by identifying the greater petrosal nerve at the facial hiatus and following it posterolaterally with a small diamond drill and constant suction and irrigation.
The surgical technique involves exposure of the geniculate ganglion, the greater petrosal nerve, and the facial nerve from the cochleariform process to the cerebellopontine angle via the middle cranial fossa approach.
The greater petrosal nerve stump is cut away so that a 5-mm segment is excised.

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